#ifndef _IDE_H
#define _IDE_H
/*
* linux/include/linux/ide.h
*
* Copyright (C) 1994-2002 Linus Torvalds & authors
*/
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/hdreg.h>
#include <linux/hdsmart.h>
#include <linux/blkdev.h>
#include <linux/proc_fs.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/bio.h>
#include <linux/device.h>
#include <linux/pci.h>
#include <linux/completion.h>
#ifdef CONFIG_BLK_DEV_IDEACPI
#include <acpi/acpi.h>
#endif
#include <asm/byteorder.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/semaphore.h>
#include <asm/mutex.h>
#if defined(CRIS) || defined(FRV)
# define SUPPORT_VLB_SYNC 0
#else
# define SUPPORT_VLB_SYNC 1
#endif
/*
* Used to indicate "no IRQ", should be a value that cannot be an IRQ
* number.
*/
#define IDE_NO_IRQ (-1)
typedef unsigned char byte; /* used everywhere */
/*
* Probably not wise to fiddle with these
*/
#define ERROR_MAX 8 /* Max read/write errors per sector */
#define ERROR_RESET 3 /* Reset controller every 4th retry */
#define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
/*
* Tune flags
*/
#define IDE_TUNE_NOAUTO 2
#define IDE_TUNE_AUTO 1
#define IDE_TUNE_DEFAULT 0
/*
* state flags
*/
#define DMA_PIO_RETRY 1 /* retrying in PIO */
#define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
#define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
/*
* Definitions for accessing IDE controller registers
*/
#define IDE_NR_PORTS (10)
#define IDE_DATA_OFFSET (0)
#define IDE_ERROR_OFFSET (1)
#define IDE_NSECTOR_OFFSET (2)
#define IDE_SECTOR_OFFSET (3)
#define IDE_LCYL_OFFSET (4)
#define IDE_HCYL_OFFSET (5)
#define IDE_SELECT_OFFSET (6)
#define IDE_STATUS_OFFSET (7)
#define IDE_CONTROL_OFFSET (8)
#define IDE_IRQ_OFFSET (9)
#define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
#define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
#define IDE_DATA_REG (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
#define IDE_ERROR_REG (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
#define IDE_NSECTOR_REG (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
#define IDE_SECTOR_REG (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
#define IDE_LCYL_REG (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
#define IDE_HCYL_REG (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
#define IDE_SELECT_REG (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
#define IDE_STATUS_REG (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
#define IDE_CONTROL_REG (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
#define IDE_IRQ_REG (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
#define IDE_FEATURE_REG IDE_ERROR_REG
#define IDE_COMMAND_REG IDE_STATUS_REG
#define IDE_ALTSTATUS_REG IDE_CONTROL_REG
#define IDE_IREASON_REG IDE_NSECTOR_REG
#define IDE_BCOUNTL_REG IDE_LCYL_REG
#define IDE_BCOUNTH_REG IDE_HCYL_REG
#define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
#define BAD_R_STAT (BUSY_STAT | ERR_STAT)
#define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
#define BAD_STAT (BAD_R_STAT | DRQ_STAT)
#define DRIVE_READY (READY_STAT | SEEK_STAT)
#define DATA_READY (DRQ_STAT)
#define BAD_CRC (ABRT_ERR | ICRC_ERR)
#define SATA_NR_PORTS (3) /* 16 possible ?? */
#define SATA_STATUS_OFFSET (0)
#define SATA_STATUS_REG (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
#define SATA_ERROR_OFFSET (1)
#define SATA_ERROR_REG (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
#define SATA_CONTROL_OFFSET (2)
#define SATA_CONTROL_REG (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
#define SATA_MISC_OFFSET (0)
#define SATA_MISC_REG (HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
#define SATA_PHY_OFFSET (1)
#define SATA_PHY_REG (HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
#define SATA_IEN_OFFSET (2)
#define SATA_IEN_REG (HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
/*
* Our Physical Region Descriptor (PRD) table should be large enough
* to handle the biggest I/O request we are likely to see. Since requests
* can have no more than 256 sectors, and since the typical blocksize is
* two or more sectors, we could get by with a limit of 128 entries here for
* the usual worst case. Most requests seem to include some contiguous blocks,
* further reducing the number of table entries required.
*
* The driver reverts to PIO mode for individual requests that exceed
* this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
* 100% of all crazy scenarios here is not necessary.
*
* As it turns out though, we must allocate a full 4KB page for this,
* so the two PRD tables (ide0 & ide1) will each get half of that,
* allowing each to have about 256 entries (8 bytes each) from this.
*/
#define PRD_BYTES 8
#define PRD_ENTRIES 256
/*
* Some more useful definitions
*/
#define PARTN_BITS 6 /* number of minor dev bits for partitions */
#define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
#define SECTOR_SIZE 512
#define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
#define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
/*
* Timeouts for various operations:
*/
#define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
#define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
#define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
#define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
#define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
#define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
/*
* Check for an interrupt and acknowledge the interrupt status
*/
struct hwif_s;
typedef int (ide_ack_intr_t)(struct hwif_s *);
/*
* hwif_chipset_t is used to keep track of the specific hardware
* chipset used by each IDE interface, if known.
*/
enum { ide_unknown, ide_generic, ide_pci,
ide_cmd640, ide_dtc2278, ide_ali14xx,
ide_qd65xx, ide_umc8672, ide_ht6560b,
ide_rz1000, ide_trm290,
ide_cmd646, ide_cy82c693, ide_4drives,
ide_pmac, ide_etrax100, ide_acorn,
ide_au1xxx, ide_forced
};
typedef u8 hwif_chipset_t;
/*
* Structure to hold all information about the location of this port
*/
typedef struct hw_regs_s {
unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */
int irq; /* our irq number */
ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
hwif_chipset_t chipset;
struct device *dev;
} hw_regs_t;
struct hwif_s * ide_find_port(unsigned long);
int ide_register_hw(hw_regs_t *, void (*)(struct hwif_s *), int,
struct hwif_s **);
void ide_setup_ports( hw_regs_t *hw,
unsigned long base,
int *offsets,
unsigned long ctrl,
unsigned long intr,
ide_ack_intr_t *ack_intr,
#if 0
ide_io_ops_t *iops,
#endif
int irq);
static inline void ide_std_init_ports(hw_regs_t *hw,
unsigned long io_addr,
unsigned long ctl_addr)
{
unsigned int i;
for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
hw->io_ports[i] = io_addr++;
hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
}
#include <asm/ide.h>
#if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
#undef MAX_HWIFS
#define MAX_HWIFS CONFIG_IDE_MAX_HWIFS
#endif
/* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
#ifndef IDE_ARCH_OBSOLETE_DEFAULTS
# define ide_default_io_base(index) (0)
# define ide_default_irq(base) (0)
# define ide_init_default_irq(base) (0)
#endif
#ifdef CONFIG_IDE_ARCH_OBSOLETE_INIT
static inline void ide_init_hwif_ports(hw_regs_t *hw,
unsigned long io_addr,
unsigned long ctl_addr,
int *irq)
{
if (!ctl_addr)
ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr));
else
ide_std_init_ports(hw, io_addr, ctl_addr);
if (irq)
*irq = 0;
hw->io_ports[IDE_IRQ_OFFSET] = 0;
#ifdef CONFIG_PPC32
if (ppc_ide_md.ide_init_hwif)
ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq);
#endif
}
#else
static inline void ide_init_hwif_ports(hw_regs_t *hw,
unsigned long io_addr,
unsigned long ctl_addr,
int *irq)
{
if (io_addr || ctl_addr)
printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__);
}
#endif /* CONFIG_IDE_ARCH_OBSOLETE_INIT */
/* Currently only m68k, apus and m8xx need it */
#ifndef IDE_ARCH_ACK_INTR
# define ide_ack_intr(hwif) (1)
#endif
/* Currently only Atari needs it */
#ifndef IDE_ARCH_LOCK
# define ide_release_lock() do {} while (0)
# define ide_get_lock(hdlr, data) do {} while (0)
#endif /* IDE_ARCH_LOCK */
/*
* Now for the data we need to maintain per-drive: ide_drive_t
*/
#define ide_scsi 0x21
#define ide_disk 0x20
#define ide_optical 0x7
#define ide_cdrom 0x5
#define ide_tape 0x1
#define ide_floppy 0x0
/*
* Special Driver Flags
*
* set_geometry : respecify drive geometry
* recalibrate : seek to cyl 0
* set_multmode : set multmode count
* set_tune : tune interface for drive
* serviced : service command
* reserved : unused
*/
typedef union {
unsigned all : 8;
struct {
unsigned set_geometry : 1;
unsigned recalibrate : 1;
unsigned set_multmode : 1;
unsigned set_tune : 1;
unsigned serviced : 1;
unsigned reserved : 3;
} b;
} special_t;
/*
* ATA-IDE Select Register, aka Device-Head
*
* head : always zeros here
* unit : drive select number: 0/1
* bit5 : always 1
* lba : using LBA instead of CHS
* bit7 : always 1
*/
typedef union {
unsigned all : 8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned head : 4;
unsigned unit : 1;
unsigned bit5 : 1;
unsigned lba : 1;
unsigned bit7 : 1;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned bit7 : 1;
unsigned lba : 1;
unsigned bit5 : 1;
unsigned unit : 1;
unsigned head : 4;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} select_t, ata_select_t;
/*
* Status returned from various ide_ functions
*/
typedef enum {
ide_stopped, /* no drive operation was started */
ide_started, /* a drive operation was started, handler was set */
} ide_startstop_t;
struct ide_driver_s;
struct ide_settings_s;
#ifdef CONFIG_BLK_DEV_IDEACPI
struct ide_acpi_drive_link;
struct ide_acpi_hwif_link;
#endif
typedef struct ide_drive_s {
char name[4]; /* drive name, such as "hda" */
char driver_req[10]; /* requests specific driver */
struct request_queue *queue; /* request queue */
struct request *rq; /* current request */
struct ide_drive_s *next; /* circular list of hwgroup drives */
void *driver_data; /* extra driver data */
struct hd_driveid *id; /* drive model identification info */
#ifdef CONFIG_IDE_PROC_FS
struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
struct ide_settings_s *settings;/* /proc/ide/ drive settings */
#endif
struct hwif_s *hwif; /* actually (ide_hwif_t *) */
unsigned long sleep; /* sleep until this time */
unsigned long service_start; /* time we started last request */
unsigned long service_time; /* service time of last request */
unsigned long timeout; /* max time to wait for irq */
special_t special; /* special action flags */
select_t select; /* basic drive/head select reg value */
u8 keep_settings; /* restore settings after drive reset */
u8 using_dma; /* disk is using dma for read/write */
u8 retry_pio; /* retrying dma capable host in pio */
u8 state; /* retry state */
u8 waiting_for_dma; /* dma currently in progress */
u8 unmask; /* okay to unmask other irqs */
u8 bswap; /* byte swap data */
u8 noflush; /* don't attempt flushes */
u8 dsc_overlap; /* DSC overlap */
u8 nice1; /* give potential excess bandwidth */
unsigned present : 1; /* drive is physically present */
unsigned dead : 1; /* device ejected hint */
unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
unsigned noprobe : 1; /* from: hdx=noprobe */
unsigned removable : 1; /* 1 if need to do check_media_change */
unsigned attach : 1; /* needed for removable devices */
unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
unsigned no_unmask : 1; /* disallow setting unmask bit */
unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
unsigned nice0 : 1; /* give obvious excess bandwidth */
unsigned nice2 : 1; /* give a share in our own bandwidth */
unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
unsigned nodma : 1; /* disallow DMA */
unsigned autotune : 2; /* 0=default, 1=autotune, 2=noautotune */
unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */
unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
unsigned post_reset : 1;
unsigned udma33_warned : 1;
u8 addressing; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
u8 quirk_list; /* considered quirky, set for a specific host */
u8 init_speed; /* transfer rate set at boot */
u8 current_speed; /* current transfer rate set */
u8 desired_speed; /* desired transfer rate set */
u8 dn; /* now wide spread use */
u8 wcache; /* status of write cache */
u8 acoustic; /* acoustic management */
u8 media; /* disk, cdrom, tape, floppy, ... */
u8 ctl; /* "normal" value for IDE_CONTROL_REG */
u8 ready_stat; /* min status value for drive ready */
u8 mult_count; /* current multiple sector setting */
u8 mult_req; /* requested multiple sector setting */
u8 tune_req; /* requested drive tuning setting */
u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
u8 bad_wstat; /* used for ignoring WRERR_STAT */
u8 nowerr; /* used for ignoring WRERR_STAT */
u8 sect0; /* offset of first sector for DM6:DDO */
u8 head; /* "real" number of heads */
u8 sect; /* "real" sectors per track */
u8 bios_head; /* BIOS/fdisk/LILO number of heads */
u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
unsigned int cyl; /* "real" number of cyls */
unsigned int drive_data; /* used by set_pio_mode/selectproc */
unsigned int failures; /* current failure count */
unsigned int max_failures; /* maximum allowed failure count */
u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
u64 capacity64; /* total number of sectors */
int lun; /* logical unit */
int crc_count; /* crc counter to reduce drive speed */
#ifdef CONFIG_BLK_DEV_IDEACPI
struct ide_acpi_drive_link *acpidata;
#endif
struct list_head list;
struct device gendev;
struct completion gendev_rel_comp; /* to deal with device release() */
} ide_drive_t;
#define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
#define IDE_CHIPSET_PCI_MASK \
((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
#define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
struct ide_port_info;
typedef struct hwif_s {
struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
struct hwif_s *mate; /* other hwif from same PCI chip */
struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
char name[6]; /* name of interface, eg. "ide0" */
/* task file registers for pata and sata */
unsigned long io_ports[IDE_NR_PORTS];
unsigned long sata_scr[SATA_NR_PORTS];
unsigned long sata_misc[SATA_NR_PORTS];
ide_drive_t drives[MAX_DRIVES]; /* drive info */
u8 major; /* our major number */
u8 index; /* 0 for ide0; 1 for ide1; ... */
u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
u8 straight8; /* Alan's straight 8 check */
u8 bus_state; /* power state of the IDE bus */
u32 host_flags;
u8 pio_mask;
u8 ultra_mask;
u8 mwdma_mask;
u8 swdma_mask;
u8 cbl; /* cable type */
hwif_chipset_t chipset; /* sub-module for tuning.. */
struct pci_dev *pci_dev; /* for pci chipsets */
const struct ide_port_info *cds; /* chipset device struct */
ide_ack_intr_t *ack_intr;
void (*rw_disk)(ide_drive_t *, struct request *);
#if 0
ide_hwif_ops_t *hwifops;
#else
/* routine to program host for PIO mode */
void (*set_pio_mode)(ide_drive_t *, const u8);
/* routine to program host for DMA mode */
void (*set_dma_mode)(ide_drive_t *, const u8);
/* tweaks hardware to select drive */
void (*selectproc)(ide_drive_t *);
/* chipset polling based on hba specifics */
int (*reset_poll)(ide_drive_t *);
/* chipset specific changes to default for device-hba resets */
void (*pre_reset)(ide_drive_t *);
/* routine to reset controller after a disk reset */
void (*resetproc)(ide_drive_t *);
/* special host masking for drive selection */
void (*maskproc)(ide_drive_t *, int);
/* check host's drive quirk list */
int (*quirkproc)(ide_drive_t *);
/* driver soft-power interface */
int (*busproc)(ide_drive_t *, int);
#endif
u8 (*mdma_filter)(ide_drive_t *);
u8 (*udma_filter)(ide_drive_t *);
void (*fixup)(struct hwif_s *);
void (*ata_input_data)(ide_drive_t *, void *, u32);
void (*ata_output_data)(ide_drive_t *, void *, u32);
void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
int (*dma_setup)(ide_drive_t *);
void (*dma_exec_cmd)(ide_drive_t *, u8);
void (*dma_start)(ide_drive_t *);
int (*ide_dma_end)(ide_drive_t *drive);
int (*ide_dma_on)(ide_drive_t *drive);
void (*dma_off_quietly)(ide_drive_t *drive);
int (*ide_dma_test_irq)(ide_drive_t *drive);
void (*ide_dma_clear_irq)(ide_drive_t *drive);
void (*dma_host_on)(ide_drive_t *drive);
void (*dma_host_off)(ide_drive_t *drive);
void (*dma_lost_irq)(ide_drive_t *drive);
void (*dma_timeout)(ide_drive_t *drive);
void (*OUTB)(u8 addr, unsigned long port);
void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
void (*OUTW)(u16 addr, unsigned long port);
void (*OUTSW)(unsigned long port, void *addr, u32 count);
void (*OUTSL)(unsigned long port, void *addr, u32 count);
u8 (*INB)(unsigned long port);
u16 (*INW)(unsigned long port);
void (*INSW)(unsigned long port, void *addr, u32 count);
void (*INSL)(unsigned long port, void *addr, u32 count);
/* dma physical region descriptor table (cpu view) */
unsigned int *dmatable_cpu;
/* dma physical region descriptor table (dma view) */
dma_addr_t dmatable_dma;
/* Scatter-gather list used to build the above */
struct scatterlist *sg_table;
int sg_max_nents; /* Maximum number of entries in it */
int sg_nents; /* Current number of entries in it */
int sg_dma_direction; /* dma transfer direction */
/* data phase of the active command (currently only valid for PIO/DMA) */
int data_phase;
unsigned int nsect;
unsigned int nleft;
struct scatterlist *cursg;
unsigned int cursg_ofs;
int rqsize; /* max sectors per request */
int irq; /* our irq number */
unsigned long dma_base; /* base addr for dma ports */
unsigned long dma_command; /* dma command register */
unsigned long dma_vendor1; /* dma vendor 1 register */
unsigned long dma_status; /* dma status register */
unsigned long dma_vendor3; /* dma vendor 3 register */
unsigned long dma_prdtable; /* actual prd table address */
unsigned long config_data; /* for use by chipset-specific code */
unsigned long select_data; /* for use by chipset-specific code */
unsigned long extra_base; /* extra addr for dma ports */
unsigned extra_ports; /* number of extra dma ports */
unsigned noprobe : 1; /* don't probe for this interface */
unsigned present : 1; /* this interface exists */
unsigned hold : 1; /* this interface is always present */
unsigned serialized : 1; /* serialized all channel operation */
unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
unsigned reset : 1; /* reset after probe */
unsigned auto_poll : 1; /* supports nop auto-poll */
unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
unsigned no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */
unsigned mmio : 1; /* host uses MMIO */
struct device gendev;
struct completion gendev_rel_comp; /* To deal with device release() */
void *hwif_data; /* extra hwif data */
unsigned dma;
#ifdef CONFIG_BLK_DEV_IDEACPI
struct ide_acpi_hwif_link *acpidata;
#endif
} ____cacheline_internodealigned_in_smp ide_hwif_t;
/*
* internal ide interrupt handler type
*/
typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *);
typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
typedef int (ide_expiry_t)(ide_drive_t *);
typedef struct hwgroup_s {
/* irq handler, if active */
ide_startstop_t (*handler)(ide_drive_t *);
/* irq handler, suspended if active */
ide_startstop_t (*handler_save)(ide_drive_t *);
/* BOOL: protects all fields below */
volatile int busy;
/* BOOL: wake us up on timer expiry */
unsigned int sleeping : 1;
/* BOOL: polling active & poll_timeout field valid */
unsigned int polling : 1;
/* BOOL: in a polling reset situation. Must not trigger another reset yet */
unsigned int resetting : 1;
/* current drive */
ide_drive_t *drive;
/* ptr to current hwif in linked-list */
ide_hwif_t *hwif;
/* for pci chipsets */
struct pci_dev *pci_dev;
/* current request */
struct request *rq;
/* failsafe timer */
struct timer_list timer;
/* local copy of current write rq */
struct request wrq;
/* timeout value during long polls */
unsigned long poll_timeout;
/* queried upon timeouts */
int (*expiry)(ide_drive_t *);
/* ide_system_bus_speed */
int pio_clock;
int req_gen;
int req_gen_timer;
unsigned char cmd_buf[4];
} ide_hwgroup_t;
typedef struct ide_driver_s ide_driver_t;
extern struct mutex ide_setting_mtx;
int set_io_32bit(ide_drive_t *, int);
int set_pio_mode(ide_drive_t *, int);
int set_using_dma(ide_drive_t *, int);
#ifdef CONFIG_IDE_PROC_FS
/*
* configurable drive settings
*/
#define TYPE_INT 0
#define TYPE_BYTE 1
#define TYPE_SHORT 2
#define SETTING_READ (1 << 0)
#define SETTING_WRITE (1 << 1)
#define SETTING_RW (SETTING_READ | SETTING_WRITE)
typedef int (ide_procset_t)(ide_drive_t *, int);
typedef struct ide_settings_s {
char *name;
int rw;
int data_type;
int min;
int max;
int mul_factor;
int div_factor;
void *data;
ide_procset_t *set;
int auto_remove;
struct ide_settings_s *next;
} ide_settings_t;
int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
/*
* /proc/ide interface
*/
typedef struct {
const char *name;
mode_t mode;
read_proc_t *read_proc;
write_proc_t *write_proc;
} ide_proc_entry_t;
void proc_ide_create(void);
void proc_ide_destroy(void);
void ide_proc_register_port(ide_hwif_t *);
void ide_proc_unregister_port(ide_hwif_t *);
void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
void ide_add_generic_settings(ide_drive_t *);
read_proc_t proc_ide_read_capacity;
read_proc_t proc_ide_read_geometry;
#ifdef CONFIG_BLK_DEV_IDEPCI
void ide_pci_create_host_proc(const char *, get_info_t *);
#endif
/*
* Standard exit stuff:
*/
#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
{ \
len -= off; \
if (len < count) { \
*eof = 1; \
if (len <= 0) \
return 0; \
} else \
len = count; \
*start = page + off; \
return len; \
}
#else
static inline void proc_ide_create(void) { ; }
static inline void proc_ide_destroy(void) { ; }
static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
#endif
/*
* Power Management step value (rq->pm->pm_step).
*
* The step value starts at 0 (ide_pm_state_start_suspend) for a
* suspend operation or 1000 (ide_pm_state_start_resume) for a
* resume operation.
*
* For each step, the core calls the subdriver start_power_step() first.
* This can return:
* - ide_stopped : In this case, the core calls us back again unless
* step have been set to ide_power_state_completed.
* - ide_started : In this case, the channel is left busy until an
* async event (interrupt) occurs.
* Typically, start_power_step() will issue a taskfile request with
* do_rw_taskfile().
*
* Upon reception of the interrupt, the core will call complete_power_step()
* with the error code if any. This routine should update the step value
* and return. It should not start a new request. The core will call
* start_power_step for the new step value, unless step have been set to
* ide_power_state_completed.
*
* Subdrivers are expected to define their own additional power
* steps from 1..999 for suspend and from 1001..1999 for resume,
* other values are reserved for future use.
*/
enum {
ide_pm_state_completed = -1,
ide_pm_state_start_suspend = 0,
ide_pm_state_start_resume = 1000,
};
/*
* Subdrivers support.
*
* The gendriver.owner field should be set to the module owner of this driver.
* The gendriver.name field should be set to the name of this driver
*/
struct ide_driver_s {
const char *version;
u8 media;
unsigned supports_dsc_overlap : 1;
ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
int (*end_request)(ide_drive_t *, int, int);
ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
struct device_driver gen_driver;
int (*probe)(ide_drive_t *);
void (*remove)(ide_drive_t *);
void (*resume)(ide_drive_t *);
void (*shutdown)(ide_drive_t *);
#ifdef CONFIG_IDE_PROC_FS
ide_proc_entry_t *proc;
#endif
};
#define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
/*
* ide_hwifs[] is the master data structure used to keep track
* of just about everything in ide.c. Whenever possible, routines
* should be using pointers to a drive (ide_drive_t *) or
* pointers to a hwif (ide_hwif_t *), rather than indexing this
* structure directly (the allocation/layout may change!).
*
*/
#ifndef _IDE_C
extern ide_hwif_t ide_hwifs[]; /* master data repository */
#endif
extern int noautodma;
extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
int uptodate, int nr_sectors);
extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
ide_expiry_t *);
ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
extern void ide_fix_driveid(struct hd_driveid *);
extern void ide_fixstring(u8 *, const int, const int);
int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
extern ide_startstop_t ide_do_reset (ide_drive_t *);
extern void ide_init_drive_cmd (struct request *rq);
/*
* "action" parameter type for ide_do_drive_cmd() below.
*/
typedef enum {
ide_wait, /* insert rq at end of list, and wait for it */
ide_preempt, /* insert rq in front of current request */
ide_head_wait, /* insert rq in front of current request and wait for it */
ide_end /* insert rq at end of list, but don't wait for it */
} ide_action_t;
extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
/*
* Issue ATA command and wait for completion.
* Use for implementing commands in kernel
*
* (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
*/
extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
enum {
IDE_TFLAG_LBA48 = (1 << 0),
IDE_TFLAG_NO_SELECT_MASK = (1 << 1),
IDE_TFLAG_FLAGGED = (1 << 2),
IDE_TFLAG_OUT_DATA = (1 << 3),
IDE_TFLAG_OUT_HOB_FEATURE = (1 << 4),
IDE_TFLAG_OUT_HOB_NSECT = (1 << 5),
IDE_TFLAG_OUT_HOB_LBAL = (1 << 6),
IDE_TFLAG_OUT_HOB_LBAM = (1 << 7),
IDE_TFLAG_OUT_HOB_LBAH = (1 << 8),
IDE_TFLAG_OUT_HOB = IDE_TFLAG_OUT_HOB_FEATURE |
IDE_TFLAG_OUT_HOB_NSECT |
IDE_TFLAG_OUT_HOB_LBAL |
IDE_TFLAG_OUT_HOB_LBAM |
IDE_TFLAG_OUT_HOB_LBAH,
IDE_TFLAG_OUT_FEATURE = (1 << 9),
IDE_TFLAG_OUT_NSECT = (1 << 10),
IDE_TFLAG_OUT_LBAL = (1 << 11),
IDE_TFLAG_OUT_LBAM = (1 << 12),
IDE_TFLAG_OUT_LBAH = (1 << 13),
IDE_TFLAG_OUT_TF = IDE_TFLAG_OUT_FEATURE |
IDE_TFLAG_OUT_NSECT |
IDE_TFLAG_OUT_LBAL |
IDE_TFLAG_OUT_LBAM |
IDE_TFLAG_OUT_LBAH,
IDE_TFLAG_OUT_DEVICE = (1 << 14),
};
struct ide_taskfile {
u8 hob_data; /* 0: high data byte (for TASKFILE IOCTL) */
u8 hob_feature; /* 1-5: additional data to support LBA48 */
u8 hob_nsect;
u8 hob_lbal;
u8 hob_lbam;
u8 hob_lbah;
u8 data; /* 6: low data byte (for TASKFILE IOCTL) */
union { /* 7: */
u8 error; /* read: error */
u8 feature; /* write: feature */
};
u8 nsect; /* 8: number of sectors */
u8 lbal; /* 9: LBA low */
u8 lbam; /* 10: LBA mid */
u8 lbah; /* 11: LBA high */
u8 device; /* 12: device select */
union { /* 13: */
u8 status; /* read: status */
u8 command; /* write: command */
};
};
typedef struct ide_task_s {
union {
struct ide_taskfile tf;
u8 tf_array[14];
};
u16 tf_flags;
ide_reg_valid_t tf_in_flags;
int data_phase;
int command_type;
ide_pre_handler_t *prehandler;
ide_handler_t *handler;
struct request *rq; /* copy of request */
void *special; /* valid_t generally */
} ide_task_t;
void ide_tf_load(ide_drive_t *, ide_task_t *);
extern u32 ide_read_24(ide_drive_t *);
extern void SELECT_DRIVE(ide_drive_t *);
extern void SELECT_MASK(ide_drive_t *, int);
extern int drive_is_ready(ide_drive_t *);
void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
/*
* taskfile io for disks for now...and builds request from ide_ioctl
*/
extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
/*
* Special Flagged Register Validation Caller
*/
extern ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
extern ide_startstop_t set_multmode_intr(ide_drive_t *);
extern ide_startstop_t set_geometry_intr(ide_drive_t *);
extern ide_startstop_t recal_intr(ide_drive_t *);
extern ide_startstop_t task_no_data_intr(ide_drive_t *);
extern ide_startstop_t task_in_intr(ide_drive_t *);
extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *);
int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
extern int system_bus_clock(void);
extern int ide_driveid_update(ide_drive_t *);
extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
extern int ide_config_drive_speed(ide_drive_t *, u8);
extern u8 eighty_ninty_three (ide_drive_t *);
extern int set_transfer(ide_drive_t *, ide_task_t *);
extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
extern int ide_spin_wait_hwgroup(ide_drive_t *);
extern void ide_timer_expiry(unsigned long);
extern irqreturn_t ide_intr(int irq, void *dev_id);
extern void do_ide_request(struct request_queue *);
void ide_init_disk(struct gendisk *, ide_drive_t *);
extern int ideprobe_init(void);
#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
extern void ide_scan_pcibus(int scan_direction) __init;
extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
#define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
#else
#define ide_pci_register_driver(d) pci_register_driver(d)
#endif
void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int, u8 *);
void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
extern void default_hwif_iops(ide_hwif_t *);
extern void default_hwif_mmiops(ide_hwif_t *);
extern void default_hwif_transport(ide_hwif_t *);
typedef struct ide_pci_enablebit_s {
u8 reg; /* byte pci reg holding the enable-bit */
u8 mask; /* mask to isolate the enable-bit */
u8 val; /* value of masked reg when "enabled" */
} ide_pci_enablebit_t;
enum {
/* Uses ISA control ports not PCI ones. */
IDE_HFLAG_ISA_PORTS = (1 << 0),
/* single port device */
IDE_HFLAG_SINGLE = (1 << 1),
/* don't use legacy PIO blacklist */
IDE_HFLAG_PIO_NO_BLACKLIST = (1 << 2),
/* don't use conservative PIO "downgrade" */
IDE_HFLAG_PIO_NO_DOWNGRADE = (1 << 3),
/* use PIO8/9 for prefetch off/on */
IDE_HFLAG_ABUSE_PREFETCH = (1 << 4),
/* use PIO6/7 for fast-devsel off/on */
IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5),
/* use 100-102 and 200-202 PIO values to set DMA modes */
IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6),
/*
* keep DMA setting when programming PIO mode, may be used only
* for hosts which have separate PIO and DMA timings (ie. PMAC)
*/
IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
/* program host for the transfer mode after programming device */
IDE_HFLAG_POST_SET_MODE = (1 << 8),
/* don't program host/device for the transfer mode ("smart" hosts) */
IDE_HFLAG_NO_SET_MODE = (1 << 9),
/* trust BIOS for programming chipset/device for DMA */
IDE_HFLAG_TRUST_BIOS_FOR_DMA = (1 << 10),
/* host uses VDMA */
IDE_HFLAG_VDMA = (1 << 11),
/* ATAPI DMA is unsupported */
IDE_HFLAG_NO_ATAPI_DMA = (1 << 12),
/* set if host is a "bootable" controller */
IDE_HFLAG_BOOTABLE = (1 << 13),
/* host doesn't support DMA */
IDE_HFLAG_NO_DMA = (1 << 14),
/* check if host is PCI IDE device before allowing DMA */
IDE_HFLAG_NO_AUTODMA = (1 << 15),
/* host is CS5510/CS5520 */
IDE_HFLAG_CS5520 = (1 << 16),
/* no LBA48 */
IDE_HFLAG_NO_LBA48 = (1 << 17),
/* no LBA48 DMA */
IDE_HFLAG_NO_LBA48_DMA = (1 << 18),
/* data FIFO is cleared by an error */
IDE_HFLAG_ERROR_STOPS_FIFO = (1 << 19),
/* serialize ports */
IDE_HFLAG_SERIALIZE = (1 << 20),
/* use legacy IRQs */
IDE_HFLAG_LEGACY_IRQS = (1 << 21),
/* force use of legacy IRQs */
IDE_HFLAG_FORCE_LEGACY_IRQS = (1 << 22),
/* limit LBA48 requests to 256 sectors */
IDE_HFLAG_RQSIZE_256 = (1 << 23),
/* use 32-bit I/O ops */
IDE_HFLAG_IO_32BIT = (1 << 24),
/* unmask IRQs */
IDE_HFLAG_UNMASK_IRQS = (1 << 25),
};
#ifdef CONFIG_BLK_DEV_OFFBOARD
# define IDE_HFLAG_OFF_BOARD IDE_HFLAG_BOOTABLE
#else
# define IDE_HFLAG_OFF_BOARD 0
#endif
struct ide_port_info {
char *name;
unsigned int (*init_chipset)(struct pci_dev *, const char *);
void (*init_iops)(ide_hwif_t *);
void (*init_hwif)(ide_hwif_t *);
void (*init_dma)(ide_hwif_t *, unsigned long);
void (*fixup)(ide_hwif_t *);
ide_pci_enablebit_t enablebits[2];
hwif_chipset_t chipset;
unsigned int extra;
u32 host_flags;
u8 pio_mask;
u8 swdma_mask;
u8 mwdma_mask;
u8 udma_mask;
};
int ide_setup_pci_device(struct pci_dev *, const struct ide_port_info *);
int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, const struct ide_port_info *);
void ide_map_sg(ide_drive_t *, struct request *);
void ide_init_sg_cmd(ide_drive_t *, struct request *);
#define BAD_DMA_DRIVE 0
#define GOOD_DMA_DRIVE 1
struct drive_list_entry {
const char *id_model;
const char *id_firmware;
};
int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
#ifdef CONFIG_BLK_DEV_IDEDMA
int __ide_dma_bad_drive(ide_drive_t *);
int ide_id_dma_bug(ide_drive_t *);
u8 ide_find_dma_mode(ide_drive_t *, u8);
static inline u8 ide_max_dma_mode(ide_drive_t *drive)
{
return ide_find_dma_mode(drive, XFER_UDMA_6);
}
void ide_dma_off(ide_drive_t *);
int ide_set_dma(ide_drive_t *);
ide_startstop_t ide_dma_intr(ide_drive_t *);
#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
extern int ide_build_sglist(ide_drive_t *, struct request *);
extern int ide_build_dmatable(ide_drive_t *, struct request *);
extern void ide_destroy_dmatable(ide_drive_t *);
extern int ide_release_dma(ide_hwif_t *);
extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int);
void ide_dma_host_off(ide_drive_t *);
void ide_dma_off_quietly(ide_drive_t *);
void ide_dma_host_on(ide_drive_t *);
extern int __ide_dma_on(ide_drive_t *);
extern int ide_dma_setup(ide_drive_t *);
extern void ide_dma_start(ide_drive_t *);
extern int __ide_dma_end(ide_drive_t *);
extern void ide_dma_lost_irq(ide_drive_t *);
extern void ide_dma_timeout(ide_drive_t *);
#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
#else
static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
static inline void ide_dma_off(ide_drive_t *drive) { ; }
static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
#endif /* CONFIG_BLK_DEV_IDEDMA */
#ifndef CONFIG_BLK_DEV_IDEDMA_PCI
static inline void ide_release_dma(ide_hwif_t *drive) {;}
#endif
#ifdef CONFIG_BLK_DEV_IDEACPI
extern int ide_acpi_exec_tfs(ide_drive_t *drive);
extern void ide_acpi_get_timing(ide_hwif_t *hwif);
extern void ide_acpi_push_timing(ide_hwif_t *hwif);
extern void ide_acpi_init(ide_hwif_t *hwif);
extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
#else
static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
#endif
extern int ide_hwif_request_regions(ide_hwif_t *hwif);
extern void ide_hwif_release_regions(ide_hwif_t* hwif);
extern void ide_unregister (unsigned int index);
void ide_register_region(struct gendisk *);
void ide_unregister_region(struct gendisk *);
void ide_undecoded_slave(ide_hwif_t *);
int ide_device_add(u8 idx[4]);
static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
{
return hwif->hwif_data;
}
static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
{
hwif->hwif_data = data;
}
const char *ide_xfer_verbose(u8 mode);
extern void ide_toggle_bounce(ide_drive_t *drive, int on);
extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
static inline int ide_dev_has_iordy(struct hd_driveid *id)
{
return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
}
static inline int ide_dev_is_sata(struct hd_driveid *id)
{
/*
* See if word 93 is 0 AND drive is at least ATA-5 compatible
* verifying that word 80 by casting it to a signed type --
* this trick allows us to filter out the reserved values of
* 0x0000 and 0xffff along with the earlier ATA revisions...
*/
if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
return 1;
return 0;
}
u8 ide_dump_status(ide_drive_t *, const char *, u8);
typedef struct ide_pio_timings_s {
int setup_time; /* Address setup (ns) minimum */
int active_time; /* Active pulse (ns) minimum */
int cycle_time; /* Cycle time (ns) minimum = */
/* active + recovery (+ setup for some chips) */
} ide_pio_timings_t;
unsigned int ide_pio_cycle_time(ide_drive_t *, u8);
u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
extern const ide_pio_timings_t ide_pio_timings[6];
int ide_set_pio_mode(ide_drive_t *, u8);
int ide_set_dma_mode(ide_drive_t *, u8);
void ide_set_pio(ide_drive_t *, u8);
static inline void ide_set_max_pio(ide_drive_t *drive)
{
ide_set_pio(drive, 255);
}
extern spinlock_t ide_lock;
extern struct mutex ide_cfg_mtx;
/*
* Structure locking:
*
* ide_cfg_mtx and ide_lock together protect changes to
* ide_hwif_t->{next,hwgroup}
* ide_drive_t->next
*
* ide_hwgroup_t->busy: ide_lock
* ide_hwgroup_t->hwif: ide_lock
* ide_hwif_t->mate: constant, no locking
* ide_drive_t->hwif: constant, no locking
*/
#define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
extern struct bus_type ide_bus_type;
/* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
#define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
/* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
#define ide_id_has_flush_cache_ext(id) \
(((id)->cfs_enable_2 & 0x2400) == 0x2400)
static inline int hwif_to_node(ide_hwif_t *hwif)
{
struct pci_dev *dev = hwif->pci_dev;
return dev ? pcibus_to_node(dev->bus) : -1;
}
static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
return &hwif->drives[(drive->dn ^ 1) & 1];
}
#endif /* _IDE_H */
